Shopping Cart (0)
My Diamonds (0)
My Jewelry (0)
My Diamond Pairs (0)
Last Visited Products

10 Things You Need to Know About Round Diamond Certification

By  , Tuesday, December 21, 2010

 diamond сertificate

AGS Platinum Certificate


1.  The two most respected and trusted gemological laboratories in the world for diamond certification are the GIA (Gemological Institute of America) Gem Trade Laboratory and the AGS (American Gem Society) Laboratory. The AGS was established by the founders of the GIA. 


2.  The GIA is the most well-known lab having developed the color and clarity grading system used today throughout the world. The AGS lab is world renowned for diamond cut grading.


3.  The AGS Laboratory pioneered the science of diamond cut quality analysis, and is the foremost authority in this critical area of diamond grading. 


4.  The AGS certificate is the document most trusted by those looking for the very best in diamond cut craftsmanship and light performance, such a super ideal diamonds.


5.  The GIA report provides a cut grade for ONLY round diamonds, while the AGS provides cut grades for princess cut diamonds and several other diamond shapes.


6.  Customers looking for certified IDEAL diamonds require AGS certificates as the GIA grading system does not use the term “Ideal”.


7.  The highest diamond cut grade in the GIA system is “Excellent” and is a broader category than AGS Ideal. The AGS diamond cut grading system is much stricter than that of the GIA.


8.  The AGS grading system uses a numerical rating from 0-10. Zero indicates zero deductions and is equivalent to IDEAL. An AGS Ideal diamond is thus known as AGS 0 (AGS Zero). Sometimes they are referred to as “Triple 0” indicating Ideal light performance, polish and symmetry.


9.  The modern AGS grading system is light performance based and involves a system called ASET (Angular Spectrum Evaluation Tool) The desktop and handheld versions of the ASET tool provide quick and easy visual analysis of a diamond’s light performance.


10.  The ultimate diamond pedigree is the AGS Platinum certificate which features the diamond color, clarity, weight, measurements, proportions, cut craftsmanship, and light performance. A computer generated ASET light map is also part of the AGS Platinum certificate.


  A cut above round diamond

Actual diamond image of a Whiteflash A CUT ABOVE


For more specific questions ask our experts
Live chat by BoldChat

Continue shopping at

  • Follow Us
  • Sign up for our Newsletter:
    Whiteflash rating :
    4.80 Rating based on 4268 reviews. Read all testimonials
  • Contact Us
    Give us feedback Give us feedback
    Telephone 1-877-612-6770
    Outside USA 1-832-252-6770
    2150 Town Square Pl
    Sugar Land,
    TX 77479 USA
    Winner of the 2015 BBB Pinnacle Award
    Best Jeweler in Houston, Texas

Welcome to Whiteflash!

We cordially invite our Houston area clients to visit our beautiful boutique style showroom for a very special experience. Come see our A CUT ABOVE® diamonds and designer engagement rings in person and meet our friendly and knowledgeable staff of jewelry professionals.

Book your appointment now by visiting our Showroom Page where you can schedule your visit and learn more about the special venue we have created for our Houston area clients